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Guard against setters mutating constants, and allow pure setters.

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Stephen Chung
2021-05-15 11:41:42 +08:00
parent 565134c4da
commit 941e09d29d
15 changed files with 184 additions and 156 deletions
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CHANGELOG.md
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@@ -4,11 +4,17 @@ Rhai Release Notes
Version 0.20.2
==============
Bug fixes
---------
* Constant propagation during optimization for constants held in a custom scope now works properly instead of always replacing by `()`.
Breaking changes
----------------
* `Engine::disable_doc_comments` is removed because doc-comments are now placed under the `metadata` feature flag.
* Registering a custom syntax now only requires specifying whether the `Scope` is adjusted (i.e. whether variables are added or removed). There is no need to specify the number of variables added/removed.
* Assigning to a property of a constant is now allowed and no longer raise an `EvalAltResult::ErrorAssignmentToConstant` error. This is to facilitate the Singleton pattern. Registered setter functions are automatically guarded against setters calling on constants and will continue to raise errors unless the `pure` attribute is present (for plugins).
New features
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@@ -22,7 +28,7 @@ Enhancements
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* Registering a custom syntax now only requires specifying whether the `Scope` is adjusted (i.e. whether variables are added or removed). This allows more flexibility for cases where the number of new variables declared depends on internal logic.
* Putting a `pure` attribute on a plugin property setter now raises a syntax error.
* Putting a `pure` attribute on a plugin property/index setter now enables it to be used on constants.
Version 0.20.1